Conveying device for testing heat dissipating fans

BACKGROUND OF THE INVENTION

p-00021. Field of the Invention

p-0003The present invention is related to a conveying device and particularly to a conveying device for testing heat dissipating fans.

p-00042. Brief Description of the Related Art

p-0005Usually, in order to secure heat dissipating fans being able to operate normally, most heat dissipating fans have to pass performance test precisely after being assembled, that is, each of the heat dissipating fans is charged with current to a state of power on for running a period of time to see if it normally runs.

p-0006The most popularly used method for testing the heat dissipating fans is that a batch of heat dissipating fans are powered on at the same time by the operator. Then, let the heat dissipating fans to run a period of time to see if the batch of heat dissipating fans runs normally. After that, another batch of heat dissipating fans are tested with the same way. This method is called batch type test.

p-0007However, the problem of the preceding method for testing the heat dissipating fans is that the operator has to power on all the heat dissipating fans in the batch at a very short time and it often to make the operator very nervously busy and messy. Afterward, there is no thing to be done by the operator during the running test. This results in waste of labor. Further, the operator has to check the imperfection of the heat dissipating fans with sight carefully. But, it is unavoidable that the operator is easy to miss the defective fan due to being careless.

p-0008Besides, another method for testing the heat dissipating fans is that delivery equipment is set up with conductor rails available on the market and the heat dissipating fans are loaded on the delivery equipment to be tested once power is supplied to the delivery equipment. The function of the conductor rails is capable of supplying power to the moving fans. However, the conductor rails used are for electric hoists and more space has to be occupied. Further, it is not easy to be moved to another position as desired so that this type of delivery equipment is not favorable for plant layout.

SUMMARY OF THE INVENTION

p-0009In order to solve the preceding problems, an object of the present invention is to provide a conveying device for testing heat dissipating fans with which the moving fans can be supplied power continuously for the operation test being implemented conveniently and a smaller space is sufficient for arranging the position needed by the conveying device flexibly.

p-0010Accordingly, the conveying device for testing heat dissipating fans according to the present invention, which is suitable for testing multiple heat dissipating fans at the same time, includes a base, a conveying unit, a plurality of movable loading tables, which are placed on the conveying unit, and a first and second conductor rail units, which are disposed under the respective movable loading table.

p-0011The conveying unit further includes a conveying element and an actuating element, which actuates the conveying element to move. Each movable loading table further includes a support plate, a test circuit on the support plate and a first and second conductive plates, which are disposed at the bottom of the support plate and spaced apart from each other. The first and second conductor rail units have a locating plate, which is fixedly attached to the base, and a plurality of micro conductor rails, which are provided on the locating plates and space from each other. Each micro conductor rail is electrically connected to each other and further includes a first main member and a first conductive spring plate, which is resiliently mounted to the first main member and is capable of contacting the first conductive plate. Each second micro conductor rail further includes a second main member and a second conductive spring plate, which is resiliently mounted to the second main member and is capable of contacting the second conductive plate.

p-0012When the first and second conductor units are charged with positive and negative current respectively, the positive and negative current are capable of being sent to the test circuit such that each of the heat dissipating fans on the movable loading tables is able to electrically connect with the test circuit for carrying out performance test during moving with the conveying device.

BRIEF DESCRIPTION OF THE DRAWINGS

p-0013The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:

p-0014<figref idrefs="DRAWINGS">FIG. 1</figref> is a perspective view of the first embodiment of a conveying device for testing heat dissipating fans according to the present invention;

p-0015<figref idrefs="DRAWINGS">FIG. 2</figref> is an exploded perspective view illustrating a movable loading table providing a first and a second conductive plates electrically contacting with a first and a second conductor rail units;

p-0016<figref idrefs="DRAWINGS">FIG. 3</figref> is a circuit diagram illustrating arrangement of related components in the test circuit of the movable loading table;

p-0017<figref idrefs="DRAWINGS">FIG. 4</figref> is a perspective view illustrating the micro conductor rails of the first and the second conductor rail units contacting with the first and the second conductive plates; and

p-0018<figref idrefs="DRAWINGS">FIG. 5</figref> is a perspective view of the second embodiment of the conveying device for testing heat dissipating fans according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

p-0019Referring to <figref idrefs="DRAWINGS">FIG. 1</figref>, the first embodiment of a conveying device for heat dissipating fans according to the present invention is suitable for testing multiple heat dissipating fans at the same time. The conveying device of the present invention includes a base <b>2</b>, a conveying unit <b>3</b>, a plurality of movable loading tables <b>5</b>, a first conductor rail unit <b>6</b> and a second conductor rail unit <b>7</b>. The base <b>2</b> provides wheels (not shown) available for adjusting the position of the conveying device.

p-0020The conveying unit <b>3</b> is provided on the base <b>2</b> and includes a conveying element <b>31</b> and an actuating element <b>32</b> for moving the conveying element <b>31</b>. The conveying element <b>31</b> is composed of two conveying belts spacing apart from each other. The actuating element <b>32</b> is a motor and the motor is conventional art so that no detail will be described further.

p-0021Referring to <figref idrefs="DRAWINGS">FIG. 2</figref>, the movable loading tables <b>5</b> are disposed on the conveying element <b>31</b> to move with the conveying element <b>31</b>. Each of the movable loading tables <b>5</b> includes a support plate <b>51</b>, a test circuit <b>52</b> on the support plate <b>51</b> and a first and second conductive plates <b>53</b>, which are disposed at the bottom of the support plate <b>51</b> and spaced apart from each other. The test circuit <b>52</b> is divided by two circuit boards <b>521</b> in order to facilitate fabrication in the present embodiment. Alternatively, the test circuit can be arranged with an integral piece of circuit board. The test circuit <b>52</b> on each movable loading table <b>5</b> has a power indication light <b>522</b>, four operation lights <b>523</b>, which are disposed on the two circuit boards <b>521</b>, and an outlet <b>524</b>, which is electrically connected to the operation lights <b>523</b>. The power indication light <b>522</b> is used for signaling if the power is normally supplied and the operation indication lights <b>523</b>, which are electrically connected to the heat dissipating fan, are used for signaling if the heat dissipating fan <b>1</b> runs smoothly.

p-0022Each of the movable loading tables <b>5</b> in the first embodiment are electrically connected to three tested heat dissipating fans <b>1</b> and, at most, the respective movable loading tables <b>5</b> can be electrically connected to four tested heat dissipating fans <b>1</b>. In practice, it is acceptable that only one tested heat dissipating fan <b>1</b> is electrically connected to one of the movable loading tables <b>5</b>. The number of tested heat dissipating fans <b>1</b> is variable based on the size of each of the heat dissipating fans <b>1</b>. Of course, more operation lights <b>523</b> and corresponding outlets <b>524</b> can be provided.

p-0023Referring to <figref idrefs="DRAWINGS">FIG. 3</figref>, it is noted that the test heat dissipating fans <b>1</b> are not affected during testing in case of any one of the heat dissipating fans being in a state of off or short circuit.

p-0024Referring to <figref idrefs="DRAWINGS">FIG. 4</figref> in company with <figref idrefs="DRAWINGS">FIG. 1</figref>, the first conductor rail unit <b>6</b> is disposed below each of the movable loading tables <b>5</b>. The first conductor rail unit <b>6</b> in the first embodiment is disposed between the conveying belts. The conveying device is connected to direct current power and the first conductor rail unit <b>6</b> is connected to the positive pole of the power.

p-0025The first conductor rail unit <b>6</b> has an elongated locating plate <b>61</b>, which is fixedly attached to the base <b>2</b>, and a plurality of micro conductor rails <b>62</b>, which are provided on the locating plate <b>61</b> to space from each other. The micro conductor rails <b>62</b> electrically connect with each other via electrical cords. Each of the micro conductor rails <b>62</b> further includes a main member <b>621</b>, a conductive spring plate <b>622</b>, which is resiliently mounted to the top of the main member <b>621</b> and is capable of the first conductive plate <b>53</b> of each of the movable loading table <b>5</b>, and an urging member <b>623</b>, which is capable of pushing the conductive spring plate <b>622</b>. The conductive spring plate <b>622</b> keeps in a state of being pushed upward by the resilient force of the urging member <b>623</b>. Hence, the conductive spring plate <b>622</b> of each micro conductor rail <b>62</b> keeps contact with the first conductive plate <b>53</b> of the corresponding movable loading table <b>5</b> to constitute a close circuit. There are at least two conductive spring plates <b>622</b>, which contact with the first conductive plate <b>53</b> at any time during each movable loading table <b>5</b> moving so as to secure the movable loading table <b>5</b> being in a state of power on.

p-0026The second conductor rail unit <b>7</b> is disposed under each movable loading table <b>5</b> to space apart the first conductor rail unit <b>6</b>. A plurality of micro conductor rails <b>62</b>, which are provided on the locating plate <b>61</b> to space from each other. Each micro conductor rail <b>72</b> further includes a main member <b>721</b>, a conductive spring plate <b>722</b>, which is resiliently mounted to the top of the main member <b>721</b> and is capable of contacting the second conductive plate <b>54</b> of each of the movable loading table <b>5</b>, and an urging member <b>723</b>, which is capable of pushing the conductive spring plate <b>722</b>.

p-0027The second conductor rail unit <b>7</b> in the first embodiment is connected to the negative pole of the power source. Similar to the first conductor rail unit <b>6</b>, there are at least two conductive spring plates <b>722</b>, which contact with the first conductive plate <b>54</b> at any time during each movable loading table <b>5</b> moving so as to secure the movable loading table <b>5</b> being in a state of power on. It is noted that the micro conductor unit <b>62</b> is identical with the micro conductor unit <b>72</b>.

p-0028Referring to <figref idrefs="DRAWINGS">FIGS. 5 and 6</figref>, the second embodiment of a conveying device for a heat dissipating fan according to the present invention is illustrated. The second embodiment of the conveying device includes two conveying units <b>3</b>, which are mounted to the base <b>2</b> and space from each other, a plurality of movable loading tables <b>5</b>, which are placed on the two conveying units <b>3</b>, two first conductor rail units <b>6</b>, two conductor rail units <b>7</b>, which space from the first conductor rail units <b>6</b>, two transfer units <b>8</b>, which are mounted to the base <b>2</b>, and two urging units <b>9</b>, which are disposed close to the transfer units <b>8</b>.

p-0029The two conveying units <b>3</b>, the movable loading tables <b>5</b> and the two first and second conductor rail units <b>6</b>, <b>7</b> are the same as those in the first embodiment and no detail will be described further.

p-0030The two transfer units <b>8</b> are disposed oppositely at two end sides of the conveying units <b>3</b> respectively and form a rectangular shape with the conveying units <b>3</b>. The transfer units <b>8</b> receive the movable loading tables <b>5</b> from the conveying units <b>3</b> to allow the movable loading tables <b>5</b> being delivered by the conveying units <b>3</b> endlessly.

p-0031Each of the transfer units <b>8</b> has a receiving platform <b>81</b> and a transfer actuating member <b>82</b>, which actuates the receiving platform <b>81</b> at least has two micro conductor rails <b>83</b> to contact the first and second conductive plates <b>53</b>, <b>54</b> of the respective movable loading table <b>5</b>. There are four micro conductor rails <b>83</b> in the second embodiment and each of the micro conductors <b>83</b> is the same as the preceding micro conductor rails <b>62</b>, <b>72</b>. The micro conductor rails <b>83</b> are disposed at the receiving platform <b>81</b> in pairs and the micro conductor pairs are arranged to space apart from each other to connect with the positive current and the negative current respectively. Hence, the movable loading tables <b>5</b> keep receiving the power for running the heat dissipating fans at the time of being carried by the receiving platform <b>81</b>.

p-0032Each urging unit <b>9</b> has an urging element <b>91</b> and a moving element <b>92</b>, which is actuated by the urging element <b>91</b>. The moving element <b>92</b> performs a retractable extending movement over the receiving platform <b>81</b> near to it to push the movable loading table <b>5</b> on the receiving platform <b>81</b> to the conveying unit <b>3</b> near to it so that testing work on the conveying unit <b>3</b> can be carried continuously. The urging element <b>91</b> actuates the urging element <b>92</b> to move reciprocally by means of pneumatics.

p-0033As the foregoing, the conveying device for testing a heat dissipating fan according to the present invention provides a plurality of micro conductor rails <b>62</b>, <b>72</b> to form the first and second conductor rails <b>6</b>, <b>7</b> by way of the micro conductor rails <b>62</b>, <b>72</b> being arranged to space apart from each other in company with the two conveying units <b>3</b> such that the first and second conductive plates <b>53</b>, <b>54</b> at the bottom of each movable loading table <b>5</b> contact with the conductive spring plates <b>622</b>, <b>722</b> sequentially during the movable loading table <b>5</b> moving for the power being able to supply the movable loading table <b>5</b> and the heat dissipating fans <b>1</b> on the movable loading tables <b>5</b> being able to be tested due to sufficient electrical energy being received continuously. In practice, the conveying device for testing heat dissipating fans according to the present invention has the following advantages:

p-00341. It is convenient for the heat dissipating fans being performed test on the conveying device and it is easy for the conveying device being assembled. Further, test efficiency can be enhanced with the conveying device. The heat dissipating fans <b>1</b> move continuously on the two conveying units <b>3</b> and the operators only need to stay at a position to watch the fans on the conveying device being tested and assembled. Meanwhile, transmission speed and the transmission distance between the two conveying units <b>3</b> are adjustable to allow the time for each movable loading table <b>5</b> moving a round being the time for a heat dissipating fan being completed testing and assembling. In this way, no idle operators are in the whole process of the fans being tested and assembled and higher test efficiency can be reached effectively.

p-00352. It is economical in cost and in occupying space. The first and second conductor rails <b>6</b>, <b>7</b> are composed of micro conductor rails <b>62</b>, <b>72</b> and each of the micro conductor rails <b>62</b>, <b>72</b> is very cheap so that it is helpful for saving cost. Further, the first and second conductor rails <b>6</b>, <b>7</b> provide smaller dimensions such that the entire size of the conveying device can be reduced relatively and it is favorable for being moved to a place as desired.

p-00363. It is capable of picking out imperfect heat dissipating fans during testing to assure quality. The operation lights <b>523</b> on each test circuit <b>52</b> allow the operators to check if the heat dissipating fans are defective with sight based on signal shown on the operation lights. Hence, the defectives can be identified easily and the quality of the heat dissipating fans can be secured. Due to the test circuit <b>52</b> being designed specially as shown in <figref idrefs="DRAWINGS">FIG. 3</figref>, short circuit is not possible to occur to affect the testing work in spite of specific heat dissipating fans <b>1</b> being power failure or short circuit.

p-00374. The endless conveying cycle allows the heat dissipating fans keep running continuously. The receiving platforms <b>81</b> of the two transfer units <b>8</b> being provided with micro conductor rails <b>83</b> allows power of the movable loading tables <b>5</b> on the receiving platforms <b>81</b> being kept supplied to prevent power failure during being transferred and especially during the urging element <b>91</b> being actuated.

p-0038While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.